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Rev 2031 Rev 2042
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    uint64_t ticks;             /**< Ticks before preemption. */
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    uint64_t ticks;             /**< Ticks before preemption. */
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    uint64_t cycles;            /**< Thread accounting. */
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    uint64_t cycles;            /**< Thread accounting. */
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    uint64_t last_cycle;        /**< Last sampled cycle. */
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    uint64_t last_cycle;        /**< Last sampled cycle. */
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    bool uncounted;             /**< Thread doesn't affect accumulated accounting. */
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    int priority;               /**< Thread's priority. Implemented as index to CPU->rq */
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    int priority;               /**< Thread's priority. Implemented as index to CPU->rq */
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    uint32_t tid;               /**< Thread ID. */
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    uint32_t tid;               /**< Thread ID. */
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    thread_arch_t arch;         /**< Architecture-specific data. */
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    thread_arch_t arch;         /**< Architecture-specific data. */
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extern spinlock_t threads_lock;
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extern spinlock_t threads_lock;
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extern btree_t threads_btree;           /**< B+tree containing all threads. */
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extern btree_t threads_btree;           /**< B+tree containing all threads. */
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extern void thread_init(void);
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extern void thread_init(void);
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extern thread_t *thread_create(void (* func)(void *), void *arg, task_t *task, int flags, char *name);
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extern thread_t *thread_create(void (* func)(void *), void *arg, task_t *task, int flags, char *name, bool uncounted);
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extern void thread_ready(thread_t *t);
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extern void thread_ready(thread_t *t);
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extern void thread_exit(void) __attribute__((noreturn));
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extern void thread_exit(void) __attribute__((noreturn));
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#ifndef thread_create_arch
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#ifndef thread_create_arch
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extern void thread_create_arch(thread_t *t);
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extern void thread_create_arch(thread_t *t);